Brand Name: GTBRacing Origin: CN Tool Supplies: CNC Cutting Material: CNC Aluminum Upgrade Parts/Accessories: Upgrade Part RC Parts & Accs: RC Car Part Remote Control Peripherals/Devices: kyosho MP9 777 STRR For Vehicle Type: kyosho MP9 777 STRR Metal Lightened 34mm flywheel for kyosho MP9 MP777 Buggy or ST-R ST-RR TruckWill fit most buggy or truck that use 2.6mm hole clutch shoes.